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When is the shortest sun shadow in Guang Zhouta?

Guang Zhouta has the shortest shadow at 12: 28 Beijing time. The length of the shadow is determined by the height of the sun. The higher the sun, the shorter the shadow. The lower the sun, the longer the shadow. The solar altitude angle varies with local time and solar declination. At sunrise and sunset, the angle is 0, at noon, the sun's altitude angle is the largest (90), and the shadow of Gwangju Tower is the shortest. At noon in Guangzhou, Beijing time (local time 120 E) 12:28.